Lotus 20

Lotus 20
Overview
Manufacturer	Team Lotus
Production	1961-62
Body and chassis
Class	Formula Junior
Body style	Open wheel
Powertrain
Engine	1098 cc Cosworth Mk.IV
Chronology
Predecessor	Lotus 18
Successor	Lotus 22

The Lotus 20 is a Formula Junior car built by Lotus for the 1961 season as a successor to the Lotus 18.

The chassis is a spaceframe, clothed in fibreglass bodywork. It has front double wishbone suspension, but the rear had a lower wishbone with the driveshaft being fixed length and therefore used as a top link. Originally fitted with Alfin drum brakes at all four corners, it was soon upgraded to discs in front and inboard drums at the rear. Equipped as standard with the Cosworth Mk.IV engine and with either a Renault Dauphine gearbox or Hewland-modified VW box.

Compared with the Lotus 18, the 20 has a much reduced frontal area and lower centre of gravity, aided by the fact the driving position was reclined so the driver was nearly lying down, compared with being more upright in the Lotus 18.

A 1962 Lotus 20 can be found hanging from the ceiling on the first floor at the Canadian Automotive Museum.

Lotus 20B

The 20B was mostly the same as the 20, but with sway bar and stock inboard drum brakes in the rear. Occasionally, 20Bs ran with Lotus TwinCam, and therefore didn't race as a Formula Junior, but as Formula Libre and in other series such as the Tasman series.^[1]

A Lotus 20 was entered in the 1965 South African Grand Prix for Dave Charlton but failed to pre-qualify.^[2]

Complete Formula One World Championship results

Year	Entrant	Engine	Tyres	Driver	1	2	3	4	5	6	7	8	9	10	Points	WCC
1965	Ecurie Tomahawk	Ford 109E 1.5 L4	D		RSA	MON	BEL	FRA	GBR	NED	GER	ITA	USA	MEX	0	NC
				Dave Charlton	DNPQ
	Brian Raubenheimer			Brian Raubenheimer	WD

References

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Team Lotus

Personnel
Founder	Colin Chapman
Notable personnel	Frank Coppuck Frank Dernie Gérard Ducarouge Maurice Philippe Peter Warr Peter Wright Len Terry

Drivers
Notable drivers	Mario Andretti Elio de Angelis Jim Clark Martin Donnelly Emerson Fittipaldi Mika Häkkinen Johnny Herbert Graham Hill Jacky Ickx Nigel Mansell Satoru Nakajima Gunnar Nilsson Ronnie Peterson Nelson Piquet Carlos Reutemann Jochen Rindt Ayrton Senna John Surtees Derek Warwick Alex Zanardi
World Champions	Mario Andretti Jim Clark Emerson Fittipaldi Graham Hill Jochen Rindt

Cars
Formula One cars	12 16 18 21 24 25 33 43 49 56B 63 72 76 77 78 79 80 81 86 87 88 91 92 93T 94T 95T 97T 98T 99T 100T 101 102 107 109 112
Formula Two cars	12 16 18 32 35 41 44 48 59 69
Formula Three cars	22 31 35 41 55 59 69
Formula Junior cars	18 20 22 27
Formula Ford cars	51 59 61 69
Formula 5000 cars	68 70
Tasman Series cars	32 39 67
Indianapolis 500 cars	29 34 38 42 56 64 96T
Sports racing cars	15 17 19 23 30 40 47 53

Formula One titles
Drivers' titles	1963 1965 1968 1970 1972 1978
Constructors' titles	1963 1965 1968 1970 1972 1973 1978

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